It was hard to imagine that such a relatively minor and inconsequential adjustment would elicit such an emotional response

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Will see what can be done with regard to making the calendar UI following the user's Regional Settings in the next version...
It is just different then what we have been using on KVS.
I now keep clicking on the wrong date (day).
It is also now different then AA.COM and DL.COM.
I think most airlines and on line travel web sites still start on a Sunday Calendar on their web site.
KVS should be the same.